This is a wallpaper version of I flipped it horizontally in Photoshop so that her eyes weren't buried beneath icons on the left-hand side of my desktop, and added in a second pteryx flying in the background

I wasn't able to match up the camera angle exactly after increasing the resolution, oh well

I wonder if they were this colorful in real life? I was watching a class on zbrush sculpting and the two guys leading the session were talking about the way they colored some of their dinosaurs for this animation (Dinosaur Revolution or something?) and they mentioned that a lot of people tend to go with muted earthly colors most of the time with dinosaurs, so they had some of their pterosaurs and other flying, gliding, or feathered prehistorics colored a bit more vividly like some modern avians. It was pretty cool to see ^^

To be honest not very long. 3D is a bit different than traditional art mediums in that once you have the assets made once, it cuts the amount of time needed to do compositions and scenes involving that item in the future - whether it's made by hand, purchased or commissioned, or etc. I'm better at lighting and to an extent hard-surface modeling (Buildings and such) than I am organic modeling (Plants and critters usually) so most of my critters are purchased.

The bulk of the time spent on this picture was fine-tuning the lights and getting the depth of field to work right. Indigo works on physically-based lighting calculations, so you can't just say "Make everything past this point blurry" on the camera - you have to set the f-stop, ISO, and other items and it blurs based on that. Having to deal with lumen and exponent values with the lights is another thing I was learning at the time, so I kept the scene simpler than most: Two dinos, and an HDR sphere, and a camera. Simple!

So the setup took a few minutes, the tweaking took an hour or two, the rendering took even longer.